Supporting device for discrete electric component

The present invention relates to a supporting device for a discrete electric component which supports and holds terminals of the discrete electric component.

FIG. 7 shows an example of a conventional supporting device for a discrete electric component. The discrete electric component such as an LED 1 , for example, has a pair of terminals 2 and 3 which are relatively long and substantially in parallel to each other. Distal end portions of these terminals 2 , 3 are bent forward in a state kept in parallel, and further bent so as to extend laterally, as shown in FIG. 7 .

On the other hand, a base plate 4 made of plastic is provided with a supporting part 5 in a column shape having a substantially T-shape in cross section.

Then, by engaging, in advance, the terminals 2 , 3 of the LED 1 with opposite sides of a main body 5 a of the supporting part 5 , the LED 1 is kept supported and held on the base plate 4 , and in this state, the distal ends of the terminals 2 , 3 are electrically connected to joint portions 4 a, 4 b of the base plate 4 by resistance welding joint, for example.

However, in the above described conventional case, there has been such a problem that the LED 1 is liable to be displaced in a direction of an arrow A before the electrical connection, and positions of the terminals to be electrically connected may come out of proper positions. Moreover, also after the electrical connection, there has been such an anxiety that in case where the LED 1 has received an outer force in the direction of the arrow A on occasion of assembling the base plate 4 and so on, the terminals 2 , 3 may be inclined in that direction, and position of a light emitting part 1 a may be displaced.

The present invention has been made in view of the above described circumstances, and its object is to provide a supporting device for a discrete electric component which can contribute to stabilization of positions to be electrically connected of terminals of the discrete electric component, and at the same time, can contribute to stabilization of posture of the discrete electric component in an electrically connected state.

In order to solve the aforesaid object, the invention is characterized by having the following arrangement.

(1) A supporting device for supporting a discrete electric component having a pair of terminals substantially in parallel to each other comprising:

a column shape main body on a mounting part;

a pair of first flange portions and a pair of second flange portions provided on opposite sides of the main body so as to project therefrom, respectively;

a first recess defined by the main body and the pair of first flange portions, into which one of the pair of terminals is inserted; and

a second recess defined by the main body and the pair of second flange portions, into which the other of the pair of terminals is inserted, thereby supporting and holding the discrete electric component.

(2) The supporting device according to (1), wherein the main body, the pair of first flange portions and the pair of second flange portions are formed in substantially H-shape in cross section.

(3) The supporting device according to (1), wherein one of the pair of first flange portions and corresponding one of the pair of second flange portions have slanting portions at upper ends thereof, respectively.

(4) The supporting device according to (3), wherein

distal end portions of the terminals are bent in one direction in a state kept in parallel to each other, and

the terminals slide along the slanting portions and the one of the pair of first flange portions and the one of the pair of second flange portions, respectively, when the discrete electric component is attached to the supporting device.

(5) The supporting device according to (4), wherein the one of the pair of first flange portions and the one of the pair of second flange portions are interrupted at a base end of the main body to provide gaps allowing the distal ends of the terminals to pass therethrough.

(6) The supporting device according to (1), wherein the first recess and the second recess are formed in an arc-shaped groove, respectively.

(7) The supporting device according to (1), wherein the discrete electric component is a LED.

In The present disclosure relates to the subject matter contained in Japanese patent application No. 2002-021805 (filed on Jan. 30, 2002), which is expressly incorporated herein by reference in their entireties.

FIG. 1 is a perspective view showing a first embodiment of a supporting device for a discrete electric component according to the present invention, prior to assembling.

FIG. 2 is a cross sectional view of a supporting part.

FIG. 3 is a front view of the supporting device in an assembled state.

FIG. 4 is a perspective view of the supporting device prior to assembling.

FIG. 5 is an external view of a power window switch.

FIG. 6 is a view corresponding to FIG. 2 showing a second embodiment according to the present invention.

FIG. 7 is a perspective view of an external appearance of a supporting device for a discrete electric component in a conventional example.

First Embodiment

Now, with reference to FIGS. 1 to 5 , a first embodiment of the present invention will be described.

FIG. 5 shows an external view of a power window switch 11 of a vehicle, in which switch knobs 13 to 16 are provided on a switch case 12 so as to be rotated upward and downward. Based on upward and downward operations of the respective switch knobs 13 to 16 , a window on a driver's seat side, a window on an assistant driver's seat side, and windows on left and right sides of a rear seat are adapted to be opened and closed. On the switch knob 13 corresponding to the window on the driver's seat side, there is formed a display part 13 a indicating that it is a knob for operating the driver's seat window. This display part 13 a is so designed as to be optically displayed.

There is shown, in FIG. 4 , an LED 17 which is a discrete electric component and a supporting device 21 for the discrete electric component provided below the aforesaid display part 13 a. The LED 17 is constituted by an LED body (light emitting part) 18 , and a pair of terminals 19 and 20 which are relatively long and in parallel to each other. Distal end portions of the terminals 19 , 20 are bent (portions 19 a, 20 a ) in one direction (forward in FIG. 4 ) while they are kept in parallel, and further bent to the right and left (portions 19 b, 20 b ).

The supporting device 21 for the discrete electric component is so designed as to include a supporting part 22 , and this supporting part 22 is provided on a circuit board 23 which is a mounting part. This circuit board 23 includes a conductor 25 molded in a substrate 24 made of plastic, and joint portions 25 a, 25 b of the conductor 25 are exposed.

The aforesaid supporting part 22 is formed in a column shape, as a whole, by integral molding for example, on the aforesaid substrate 24 . The supporting part 22 includes a main body 26 , and a pair of first flange portions 27 a, 27 b and a pair of second flange portions 28 a, 28 b which are respectively provided so as to project from opposite sides of this main body 26 , and the supporting part 22 has a substantially H-shape in cross section.

A first recess 29 is defined by the aforesaid main body 26 and a pair of the first flange portions 27 a, 27 b, as well as a second recess 30 is defined by the aforesaid main body 26 and a pair of the second flange portions 28 a, 28 b.

The flange portion 27 a which is one of the first flange portions of the supporting part 22 , and the flange portion 28 a corresponding to this flange portion 27 a, which is one of the second flange portions, are slanted at their upper end parts (diagonal parts 27 c, 28 c ), and these flange portions 27 a and 28 a are interrupted at a base end of the supporting part 22 (parts 27 d, 28 d ) to provide slanting portions.

The LED 17 is supported and held by the supporting part 22 , and at the same time, the portions 19 b, 20 b of the terminals 19 , 20 are joined to the joint portions 25 a, 25 b by resistance welding, for example.

Describing now steps for supporting and holding the above described LED 17 , the LED 17 is positioned above the supporting part 22 , as shown in FIG. 1 , and from this state, the LED 17 is moved downward, abutting the portions 19 a, 20 a of the terminals 19 , 20 against the slanting portions 27 c, 28 c, so as to slide along the diagonal parts. Then, the terminals 19 , 20 are opened apart by their elasticity and slide down from the slanting portions 27 c, 28 c to the lower ends of the flange portions 27 a, 28 a. The terminals 19 , 20 are restored to the original state at the interrupted parts 27 d, 28 d of the flange portions 27 a, 28 a by elastic restoring force. In this manner, the terminals 19 , 20 enter into the first recess 29 and the second recess 30 respectively. As the results, the LED 17 is supported and held by the supporting part 22 (Refer to FIG. 3 and FIG. 4 ). In this state, the distal end portions 19 b, 20 b of the terminals 19 , 20 are positioned on the joint portions 25 a, 25 b. In this state of position, the welding joint will be conducted.

As described above, according to the present embodiment, a pair of the terminals 19 , 20 of the LED 17 are inserted into the first recess 29 and the second recess 30 , so that the LED 17 will be supported and held without misalignment. Accordingly, the posture and the position of the LED 17 will not be displaced in case of electrically connecting the terminals 19 , 20 , and also after the electrical connection has been completed.

In particular, although a pair of the terminals 19 , 20 have the bent portions 19 a, 20 a, a pair of the terminals 19 , 20 can favorably enter into the first recess 29 and the second recess 30 , because the first flange portion 27 a and the second flange portion 28 a of the supporting part 22 have slanting portions at their upper ends, respectively, and these flange portions 27 a and 28 a are interrupted at their base ends. Specifically, the bending distal end portions 19 b, 20 b of a pair of the terminals 19 , 20 move along the slanting portions 27 c, 28 c of the first flange portion and the second flange portion to be opened apart from each other, and are restored to the original state at the interrupted parts 27 d and 28 d of the first flange portion 27 a and the second flange portion 28 a. Consequently, a pair of the terminals 19 , 20 will favorably enter into the first recess 29 and the second recess 30 .

Second Embodiment

FIG. 6 shows a second embodiment of the present invention. A supporting part 41 according to the second embodiment is designed in such a manner that inner faces of a main body 44 , a pair of first flange portions 45 a, 45 b, and a pair of second flange portions 46 a, 46 b are rounded, in order that a first recess 42 and a second recess 43 may be formed in an arc-shaped groove, respectively. In this manner, substantially same operational effects as in the first embodiment can be expected.

The present invention is not limited to the above described embodiments, but the discrete electric components may include other components beside the LED, for example, transistor, resistance, or condenser, etc.

As apparent from the foregoing description, the present invention can contribute to stabilization of the positions to be electrically connected of the terminals of the discrete electric component, and also contribute to stabilization of the posture of the discrete electric component in an electrically connected state.